Tongue fish swimming over molten sulphur

One of the amazing sights at Sulfur Cauldron was seeing flatfish swimming out on the crusted-over surface of the molten sulfur pond! These fish live on the adjacent slopes of the volcano in hydrothermal areas, but to see them on the sulfur pond was mind-boggling! Why would they do that? For more info visit www.evolutiondiary.com Video courtesy of Submarine Ring of Fire 2006 Exploration, NOAA Vents Program.